Numeracy problems to solve for Key Stage 1, 2 and 3

You have one each of the following stamps.

This letter will cost 9p to send. can I use just one stamp? How many different combinations can I use?

Josh and brandon had just finished a game of chess. Brandon had claimed the game hands down and Josh was determined to win something. "Bet I can tell you how many squares there are on this chess board!" he said. "That's easy," replied Brandon "everyone knows there are 64!" Josh shook his head. "Then everyone is wrong Brandon," he laughed.

Do you agree with Brandon or is Josh right?